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KCC?? ??? ?? ???? SL907-????, SL825, SW9535A, PU9330, WL9530 ? ? 5? ???? ?? HB?? ??? ??? ????.
SL825 ??? ??? ??????? ???? ????? ?? ?? ???? ?? ???? ??? ?? ???? ????. PU9330 ??? ?????? ???? ??? ??? ??? ???? SW9535A, WL9530 ??? ?? ??? ???? ?? ?? ?? ?? ? ?? ?? ???? ?? ?????.
?? ??? ?? ??? ????????? ???? ? ??? ??? ??? ??? KCC? ? ??? ??? ?? ???, ????, ?? ???? ?? ??? ??? ???? ???? ASTM ???? ?? ????? ???? ??.
??? ?? sonhj@donga.com